Drop some penetrating oil in the wiper/nut hole where it bolts to the motor shaft. Then gently tap the wiper with a small hammer. It will loosen up. But you must do this with the wiper in an upright standing position, not parked on the window. 91 NX2000 with work. 97 Maxima SE, smooth and powerful automatic http://www.angelfire.com/ny/ianjiggyroom/IansNX2000page.html